About WACKER Silicone Encapsulants and Potting Compounds
Silicone encapsulants from WACKER are effective for the potting and encapsulation of electronic control units, sensors, printed circuit boards, semiconductor devices or microchips. Potting or encapsulation provides efficient protection from the environment, assisting in reliable operation over the lifetime of electronic devices.
We offer one and two component WACKER products for potting and encapsulation applications. Silicone gels offer minimal thermal stress on sensitive parts and ensure that the device will work properly even when exposed to extreme temperature fluctuations or strong vibrations. For sensor applications, gels characterised by particularly low volatility and low bleed are becoming increasingly important.
Features & Benefits
- High thermal shock resistance
- Low shrinkage
- Good adhesion including to polymer housings
- Low outgassing
- Low uncured-silicone bleed
- Formulations from Shore 00-55 to A80
- Transparent versions available
|Product||Characteristics||Volume Resistivity (ohm.cm)||Dielectric Strength (KV/mm)||Colour||Hardness (Shore A)||Viscosity (mPas)||Temperature Range|
|Elastosil E10||Flowable sealant with excellent heat stability up to 250ºC, long-term elasticity under thermal stress, and good mechanical properties. Low hardness. Applications include sealing of heating elements.||10^14||21||Transparent||25||8,000||up to 250°C|
|Elastosil E50N||Food compliant, transparent silicone for coating and potting applications including textile coatings. Medium hardness, more rigid than E43N.||Transparent||35||50,000||up to 180°C|
|Elastosil N2034||Flowable, non-corrosive black silicone for technical applications including bonding, sealing, coating, potting and gasketing. Self-levelling with medium hardness when cured, and flame retardant.||Black||35||25,000||-50 to 180°C|
|Elastosil RT 428||Thermally conductive potting compound with excellent heat resistance and high hardness. Recommended for electronics encapsulation.||Reddish-brown||65||12,000||200°C|
|Elastosil RT 601||Highly transparent, low viscosity electronics potting compound for circuit protection. Medium cured hardness. Also useful for optical applications (e.g. solar panels). Food compliant.||10^15||23||Transparent||45||3,500||150°C|
|Elastosil RT 602||Low viscosity silicone potting compound with rapid heat cure, medium cured hardness and excellent heat stability. Food compliant.||10^15||Light grey||30||3,500||200°C|
|Elastosil RT 604||Softer than RT 601. Highly transparent, very low viscosity electronics potting compound for circuit protection. Also useful for optical applications (e.g. solar panels). Food compliant.||10^15||23||Transparent||25||800||150°C|
|Elastosil RT 607||Very hard, flame retardant silicone potting compound with rapid heat cure and excellent heat resistance. Food compliant.||10^15||23||Reddish-brown||55||10,000||210°C|
|Elastosil RT 745||Tough gel with primerless adhesion and rapid heat cure. Applications include potting and encapsulation of components for measurement and control, sensor technology, and electronics including automotive.||10^16||Translucent-brownish||15||1,000||160°C|
|Elastosil RT 745 S||Softer version of Elastosil RT 745. May be suitable for some automotive applications involving water immersion.||10^15||Translucent-brownish||Shore 00 – 37||1,000||160°C|
|SilGel 612||Crystal clear silicone gel well suited to encapsulation of LEDs, manufacturing of solar panels, and electronics applications. Very low bleed, good adhesion, low stress, flame retardant. Rapid heat cure.||10^15||23||Transparent||Very soft gel||1,000||160°C|
|SilGel 613||Similar to SilGel 612, but is lower viscosity and works with catalysts to speed up curing, including a UV-curing catalyst.||Transparent||Very soft gel||150||160°C|
|Silpuran 4200||Medical-grade, biocompatible acetoxy-curing adhesive sealant which meets the requirements of ISO 10993 and USP Class VI. Fast skin time; medium hardness.||Translucent||35||300,000|
|Elastosil RT K||Silicone potting compound, condensation curing with Cat T catalyst. Flowable, with good post mix self deaeration. Medium hardness.||10^14||23||Light grey||45||7,000||-50°C to 180°C|
|Elastosil RT 426||Potting and encapsulation compound for electronics and lighting applications, with excellent heat resistance and high hardness.||Reddish-brown||60||15,000||200°C|
|Semicosil 961 TC||Gap filler which cures to a soft, tacky rubber. Highly thermally conductive interface material for electronic heat sink applications.||10^13||8||Yellow||25||130,000||-50° to 130°C|
For additional specifications, view our selector guide.
See how one customer got results from Wacker SilGel 612 for an LED encapsulation application in this Case Study:
|Potting LED strips for outdoor signage made easy with silicone gel
A UK manufacturer of outdoor signage and lighting products was seeking to encapsulate their LED strips to protect them from environmental damage, whilst maintaining a desirable aesthetic in the finished product. Wacker SilGel 612 fit the bill.
- Last updated: December 2020
- Version: 2.2
Semicosil®, Elastosil®, and SilGel® are registered trademarks of Wacker Chemie AG. Statements, technical information and recommendations contained herein are based on tests we believe to be reliable but they are not to be construed in any manner as warrantees expressed or implied. The user shall determine the suitability of the product for his intended use and the user assumes all risk and liability whatsoever in connection therewith.